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6d7e8eda | 1 | /* Copyright (C) 2003-2023 Free Software Foundation, Inc. |
4165d44d | 2 | This file is part of the GNU C Library. |
4165d44d UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
4165d44d UD |
17 | |
18 | #include <errno.h> | |
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <time.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | ||
f38a3086 | 26 | #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 |
4165d44d UD |
27 | static pthread_barrier_t b2; |
28 | static pthread_barrier_t bN; | |
29 | ||
30 | ||
31 | static void * | |
32 | tf (void *arg) | |
33 | { | |
34 | int e = pthread_barrier_wait (&b2); | |
35 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
36 | { | |
37 | puts ("barrier_wait failed"); | |
38 | exit (1); | |
39 | } | |
40 | ||
41 | e = pthread_barrier_wait (&bN); | |
42 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
43 | { | |
44 | puts ("barrier_wait failed"); | |
45 | exit (1); | |
46 | } | |
47 | ||
48 | return NULL; | |
49 | } | |
abca9f7f | 50 | #endif |
4165d44d UD |
51 | |
52 | ||
53 | int | |
54 | do_test (void) | |
55 | { | |
e4bb4853 | 56 | #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 |
4165d44d UD |
57 | # define N 10 |
58 | ||
c56da3a3 UD |
59 | # if _POSIX_THREAD_CPUTIME == 0 |
60 | if (sysconf (_SC_THREAD_CPUTIME) < 0) | |
61 | { | |
62 | puts ("_POSIX_THREAD_CPUTIME option not available"); | |
63 | return 0; | |
64 | } | |
65 | # endif | |
66 | ||
4165d44d UD |
67 | if (pthread_barrier_init (&b2, NULL, 2) != 0 |
68 | || pthread_barrier_init (&bN, NULL, N + 1) != 0) | |
69 | { | |
70 | puts ("barrier_init failed"); | |
71 | return 1; | |
72 | } | |
73 | ||
74 | struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
75 | TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); | |
76 | ||
77 | pthread_t th[N + 1]; | |
78 | clockid_t cl[N + 1]; | |
abca9f7f | 79 | # ifndef CLOCK_THREAD_CPUTIME_ID |
4165d44d UD |
80 | if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0) |
81 | { | |
82 | puts ("own pthread_getcpuclockid failed"); | |
83 | return 1; | |
84 | } | |
abca9f7f | 85 | # else |
4165d44d | 86 | cl[0] = CLOCK_THREAD_CPUTIME_ID; |
abca9f7f | 87 | # endif |
4165d44d | 88 | |
4d1a02ef UD |
89 | pthread_attr_t at; |
90 | ||
91 | if (pthread_attr_init (&at) != 0) | |
92 | { | |
93 | puts ("attr_init failed"); | |
94 | return 1; | |
95 | } | |
96 | ||
97 | if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) | |
98 | { | |
99 | puts ("attr_setstacksize failed"); | |
100 | return 1; | |
101 | } | |
102 | ||
4165d44d UD |
103 | int i; |
104 | int e; | |
105 | for (i = 0; i < N; ++i) | |
106 | { | |
4d1a02ef | 107 | if (pthread_create (&th[i], &at, tf, NULL) != 0) |
4165d44d UD |
108 | { |
109 | puts ("create failed"); | |
110 | return 1; | |
111 | } | |
112 | ||
113 | e = pthread_barrier_wait (&b2); | |
114 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
115 | { | |
116 | puts ("barrier_wait failed"); | |
117 | return 1; | |
118 | } | |
119 | ||
120 | ts.tv_sec = 0; | |
121 | ts.tv_nsec = 100000000; | |
122 | TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); | |
123 | ||
124 | if (pthread_getcpuclockid (th[i], &cl[i + 1]) != 0) | |
125 | { | |
126 | puts ("pthread_getcpuclockid failed"); | |
127 | return 1; | |
128 | } | |
129 | } | |
130 | ||
4d1a02ef UD |
131 | if (pthread_attr_destroy (&at) != 0) |
132 | { | |
133 | puts ("attr_destroy failed"); | |
134 | return 1; | |
135 | } | |
136 | ||
4165d44d UD |
137 | struct timespec t[N + 1]; |
138 | for (i = 0; i < N + 1; ++i) | |
139 | if (clock_gettime (cl[i], &t[i]) != 0) | |
140 | { | |
141 | printf ("clock_gettime round %d failed\n", i); | |
142 | return 1; | |
143 | } | |
144 | ||
145 | for (i = 0; i < N; ++i) | |
146 | { | |
147 | struct timespec diff; | |
148 | ||
149 | diff.tv_sec = t[i].tv_sec - t[i + 1].tv_sec; | |
150 | diff.tv_nsec = t[i].tv_nsec - t[i + 1].tv_nsec; | |
151 | if (diff.tv_nsec < 0) | |
152 | { | |
153 | diff.tv_nsec += 1000000000; | |
154 | --diff.tv_sec; | |
155 | } | |
156 | ||
157 | if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000)) | |
158 | { | |
159 | printf ("\ | |
160 | difference between thread %d and %d too small (%ld.%09ld)\n", | |
161 | i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); | |
162 | return 1; | |
163 | } | |
164 | ||
165 | printf ("diff %d->%d: %ld.%09ld\n", | |
166 | i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); | |
167 | } | |
168 | ||
169 | ts.tv_sec = 0; | |
170 | ts.tv_nsec = 0; | |
171 | for (i = 0; i < N + 1; ++i) | |
172 | if (clock_settime (cl[i], &ts) != 0) | |
173 | { | |
174 | printf ("clock_settime(%d) round %d failed\n", cl[i], i); | |
175 | return 1; | |
176 | } | |
177 | ||
178 | for (i = 0; i < N + 1; ++i) | |
179 | { | |
180 | if (clock_gettime (cl[i], &ts) != 0) | |
181 | { | |
182 | puts ("clock_gettime failed"); | |
183 | return 1; | |
184 | } | |
185 | ||
186 | if (ts.tv_sec > t[i].tv_sec | |
187 | || (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec)) | |
188 | { | |
189 | puts ("clock_settime didn't reset clock"); | |
190 | return 1; | |
191 | } | |
192 | } | |
193 | #endif | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | ||
199 | #define TEST_FUNCTION do_test () | |
200 | #include "../test-skeleton.c" |